Oral irrigator



FIG. 1 is a front perspective of an oral irrigator;

FIG. 2 is a front elevation thereof;

FIG. 3 is a rear elevation thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the drawings illustrate portions of the oral irrigator that form no part of the claimed design. 

CLAIM I claim the ornamental design for an oral irrigator, as shown and described. 